Thank you so much my one had same problem I followed your advice and it's now working perfectly.
E Cumming
October 2012
look underthe rubber grips at the bottom to find 4 black screws. remove these and you will see that on/off switch is broken where it meets the mother board.
simply switch permananetly onto ON and put back together. works a dream.
Andy Taylor
October 2010
I can answer this question...
power switch on Philips PET712/05 not engaging/broken. ?